Patent Application
20230210056
The present invention relates to a harvester, and more specifically, a harvester including a harvesting section that harvests crops in a field, and a threshing apparatus into which the crops harvested by the harvesting section are introduced and which threshes the introduced crops, the threshing apparatus including a threshing chamber into which the crops are introduced, a threshing drum that is provided in the threshing chamber so as to rotate using a threshing drum axis extending in a front-rear direction of the threshing chamber as a rotation axis, and that threshes the crops introduced into the threshing chamber, and a receiving net provided in an outer periphery of a lower part of the threshing drum.
The present invention also relates to a threshing apparatus for threshing harvested crops.
As shown in Japanese Patent No. 3418078, Patent Document 1, there is a threshing apparatus including a threshing chamber, a threshing drum that is rotatably provided in the threshing chamber and threshes the crops in the threshing chamber, and a receiving net provided in an outer periphery of a lower part of the threshing drum, in which an interval between the receiving net and the threshing drum can be adjusted by changing an attachment position of the threshing drum.
A threshing apparatus is provided with a threshing drum that rotates about an axis extending in a front-rear direction inside a threshing chamber, and threshes crops introduced into the threshing chamber with the threshing drum. In addition, a plurality of debris transport valves that guide processing material, which rotates while being moved around by the threshing drum, toward the rear of the threshing chamber, are provided side by side at an interval in the axial direction on the inner surface of a top plate of the threshing chamber. Conventionally, a plurality of debris transport valves are supported in such a manner that the feed angle can be changed by swinging about a vertical axis, and the plurality of debris transport valves are integrally swung so that all of the debris transport valves are changed to the same feed angle (see Japanese Patent Application Laid-Open No. 2019-83803, Patent Document 2, for example).
The threshing apparatus includes a threshing drum rotatably provided inside a threshing chamber into which reaped grain culms are introduced, and includes a receiving net along an outer periphery of the threshing drum, below the threshing drum. In addition, a sorting apparatus is included, which is located below the receiving net, receives the threshing material that has leaked from the receiving net, and sorts the threshing material while swinging and transferring the threshing material. Conventionally, an upstream end of the receiving net located on an upstream side in a rotation direction of the threshing drum and a downstream end thereof located on a downstream side in the rotation direction of the threshing drum are both provided at higher positions than the rotation axis of the threshing drum (for example, see Japanese Patent Application Laid-Open No. 2013-146272, Patent Document 3).
Patent Document 1: Japanese Patent No. 3418078
Patent Document 2: Japanese Patent Application Laid-Open No. 2019-83803
Patent Document 3: Japanese Patent Application Laid-Open No. 2013-146272
Problem 1
The problem corresponding to [Related Art 1] is as follows.
A harvester is desired in which the interval between the receiving net and the threshing drum can be adjusted such that threshing is performed without insufficient threshing or the like when crops with different properties are harvested, when the amount of crops introduced into the threshing chamber changes, or the like. However, when the conventional technique is adopted, the attachment position of the threshing drum is changed, and therefore the interval between the receiving net and the threshing drum changes almost uniformly over the entire receiving net. Also, a large operating force is required.
The present invention provides a harvester capable of adjusting the interval between a receiving net and a threshing drum with a light operating force and in such a manner that the interval between the receiving net and the threshing drum is changed in various ways in the front-rear direction of the threshing chamber.
Also, the present invention provides a harvester that can easily and inexpensively adjust the interval between the receiving net and the threshing drum in such a manner that the interval is changed in various ways in the peripheral direction of the threshing drum.
Problem 2
The problem corresponding to [Related Art 2] is as follows.
The above-mentioned conventional configuration is a configuration in which the feed angle can be adjusted according to differences in the type and property of the crop, but all of the debris transport valves are changed to the same angle. For this reason, after the feed angle is changed and set, the same feeding function acts on substantially the entire region in the front-rear direction of the threshing chamber. That is, in order to improve the shedding performance, it is preferable to make the feed angle gentler and perform threshing appropriately. However, in this case, there is a disadvantage in that if stalk waste (discharged straw) resulting from threshing is to be used as animal feed, the grain culms will be severely damaged, making it unsuitable for animal feed, or the like.
In view of this, it has been desired to be able to adjust the feeding condition of the processing material by the debris transport valves to an appropriate state in response to differences in working conditions.
Problem 3
The problem corresponding to [Related Art 3] is as follows.
In the above-described conventional configuration, the threshing drum and the receiving net face each other along the peripheral direction of the threshing drum, and therefore the threshing performance on the crops is improved. However, in this configuration, when the threshing material that has been threshed and leaks from the receiving net is sorted by the lower sorting apparatus, the amount (layer thickness) of the threshing material that falls on the sorting apparatus varies significantly in the left-right direction.
To add description, in the portion of the sorting apparatus located on the upstream side in the rotation direction of the threshing drum in the receiving net, a large amount of the threshing material leaks downward since it is the location where the threshing performed by the rotating threshing drum and the receiving net is started while the crop is moved around when there is room in the radial direction on the upper side of the threshing drum. Moreover, since the upstream end of the receiving net is in a substantially vertical orientation and is steeply inclined, the leakage area of the receiving net per unit width in the left-right direction increases, which also increases the amount of threshing material. In the vicinity of the central portion of the receiving net in the left-right direction, the inclination of the receiving net is gentle and the leakage area of the receiving net per unit width in the left-right direction in the sorting apparatus is small, and therefore the amount of threshing material is reduced.
On the sorting apparatus, the amount of threshing material varies significantly, such as the amount of threshing material being the largest at the upstream side of the receiving net in the rotation direction of the threshing drum, and the amount being small in other areas. In this manner, when the amount of threshing material on the sorting apparatus increases locally, when the grains, which are the target material from the threshing material, are leaked out and sorted, there is a risk that the grains will be discharged outward together with straw waste without being sufficiently leaked out and sorted. As a result, there is a disadvantage that the sorting accuracy of the sorting apparatus is lowered.
In view of this, it has been desired to improve the sorting accuracy when sorting the threshing material, without lowering the threshing capacity.
The solution corresponding to the problem of providing a harvester that can adjust the interval between the receiving net and the threshing drum with a light operating force and in such a manner that the interval is changed in various ways in the front-rear direction of the threshing chamber in [Problem 1] is as follows.
A harvester according to the present invention includes: a harvesting section configured to harvest a crop in a field; and a threshing apparatus into which the crop harvested by the harvesting section is introduced and which is configured to thresh the introduced crop, in which the threshing apparatus includes a threshing chamber into which the crop is introduced, a threshing drum that is provided in the threshing chamber in such a manner as to rotate with a threshing drum axis extending in a front-rear direction of the threshing chamber serving as a rotation center, and configured to thresh the crop introduced into the threshing chamber, and a receiving net provided in an outer periphery of a lower part of the threshing drum, the receiving net is divided into a plurality of divided receiving net bodies in the front-rear direction, and the plurality of divided receiving net bodies are operated to adjust, for each of the plurality of divided receiving net bodies, an interval in a radial direction of the threshing drum between the divided receiving net body and the threshing drum.
According to this configuration, the interval between the receiving net and the threshing drum (the interval in the radial direction of the threshing drum) in the plurality of divided receiving net bodies can be adjusted for each divided receiving net body, and therefore the interval between the receiving net and the threshing drum can be adjusted in such a manner as to change in various ways in the front-rear direction of the threshing chamber. Since the interval between the receiving net and the threshing drum is adjusted by operating the divided receiving net bodies, the interval can be adjusted with a light operating force.
In the present invention, it is preferable to include an interval adjusting mechanism that is separately joined to each of the plurality of divided receiving net bodies and configured to adjust the interval in the divided receiving net body.
According to this configuration, since the operation for adjusting the interval of each divided receiving net body is performed by the dedicated interval adjusting mechanism connected to the divided receiving net body, it is easy to adjust the interval for each divided receiving net body.
In the present invention, it is preferable that the divided receiving net body includes a support shaft provided extending in the front-rear direction on one end in a peripheral direction of the threshing drum of the divided receiving net body, and the divided receiving net body is supported in such a manner as to be swingable vertically with the support shaft serving as a swinging support point, and the interval adjusting mechanism is joined to another end in the peripheral direction of the threshing drum of the divided receiving net body, and adjusts the interval of the divided receiving net body by swinging the divided receiving net body vertically.
According to this configuration, the interval between the divided receiving net body and the threshing drum is adjusted by vertically swinging the divided receiving net body, and therefore the support structure for the divided receiving net body can be simplified compared to the case where the interval between the divided receiving net body is adjusted by sliding the divided receiving net body.
In the present invention, it is preferable that the plurality of divided receiving net bodies are a front divided receiving net body and a rear divided receiving net body obtained by dividing the receiving net into two in the front-rear direction, the interval adjusting mechanism configured to adjust the interval of the front divided receiving net body includes a first electric motor configured to operate the interval adjusting mechanism, the interval adjusting mechanism configured to adjust the interval of the rear divided receiving net body includes a second electric motor configured to operate the interval adjusting mechanism, the first electric motor is provided outside of a front wall of the threshing chamber, and the second electric motor is provided outside of a rear wall of the threshing chamber.
According to this configuration, although the first electric motor is adopted as the motive power source for adjusting the interval of the front divided receiving net body and the second electric motor is adopted as the motive power source for adjusting the interval of the rear divided receiving net body, since the first electric motor can be handled outside the front wall and the second electric motor can be handled outside the rear wall, the first electric motor and the second electric motor can be easily inspected and repaired.
In the present invention, it is preferable to include: an actuator configured to adjust the intervals of the plurality of divided receiving net bodies; and a link mechanism linking the actuator and the plurality of divided receiving net bodies, in which the link mechanism transmits motive power with different link ratios to the plurality of divided receiving net bodies in such a manner that adjustment allowances of the intervals of the plurality of divided receiving net bodies adjusted by the actuator are different for the plurality of divided receiving net bodies.
According to this configuration, the motive power of the actuator is transmitted to the plurality of divided receiving net bodies by the link mechanism to operate the plurality of divided receiving net bodies, thereby adjusting the interval between the divided receiving net body and the threshing drum in the plurality of divided receiving net bodies. However, since the link ratio of the motive power transmission to the divided receiving net body by the link mechanism is different depending on the divided receiving net body, the interval adjustment of the plurality of divided receiving net bodies can be performed by the shared actuator, and thus it is possible to make the adjustment allowances for the interval adjustment in the divided receiving net bodies different depending on the divided receiving net body while reducing the number of actuators to be provided.
The solution corresponding to [Problem 2] is as follows.
A characteristic configuration of a threshing apparatus according to the present invention includes: a threshing chamber; a threshing drum that is rotatably provided in the threshing chamber and configured to perform threshing of a crop introduced into a front part of the threshing chamber; a top plate covering an upper portion of the threshing chamber; and a plurality of debris transport valves that are supported on the top plate, arranged side by side along a rotation axis of the threshing drum, and configured to feed and guide a threshing material toward a rear part of the threshing chamber, in which the plurality of debris transport valves are attached with changeable feed angles, and the threshing apparatus further includes: a first angle adjusting mechanism capable of simultaneously changing feed angles of a plurality of front debris transport valves located frontward among the plurality of debris transport valves; and a second angle adjusting mechanism capable of simultaneously changing feed angles of a plurality of rear debris transport valves located rearward among the plurality of debris transport valves.
According to the present invention, the feed angles of the plurality of front debris transport valves are changed and adjusted by the first angle adjusting mechanism. On the other hand, the feed angles of the plurality of rear debris transport valves are changed and adjusted by the second angle adjusting mechanism. That is, the feed angles of the plurality of front debris transport valves and the plurality of rear debris transport valves can be changed separately, and can be set to different feed angles.
For example, a method of use is possible in which, in the region on the front side of the threshing chamber, the feed angle of the debris transport valves is relaxed so as not to reduce the shedding performance, and in the region on the rear side of the threshing chamber, the feed angle of the debris transport valves is steepened to increase the transfer speed of the processing material and prevent the discharged straw from being damaged.
In the threshing chamber, the drive load of the threshing drum is large at the front side where the crops are first introduced, and the drive load is small at the rear side. In view of this, if the crops shed easily, a method of use is also possible in which, in the region on the front side of the threshing chamber, the feed angle of the debris transport valves is increased to increase the transfer speed of the processing material and reduce the drive load, and in the region on the rear side of the threshing chamber, in which the drive load is small, the feed angle of the debris transport valves can be reduced to reliably perform threshing without threshing leakage.
Accordingly, it is possible to adjust the feeding condition of the processing material fed by the debris transport valves to an appropriate state according to the difference in working conditions.
In the present invention, it is preferable that the threshing drum includes a first threshing processing section located at a front part, and a second threshing processing section, which is located at a rear part and has a different structure from the first threshing processing section, the plurality of front debris transport valves are provided on the top plate at a position corresponding to the first threshing processing section, and the plurality of rear debris transport valves are provided on the top plate at a position corresponding to the second threshing processing section.
According to this configuration, since the structures of the first threshing processing section and the second threshing processing section are different from each other, the methods of threshing are different. In response to such differences in the threshing processing sections, the feed angle of the front debris transport valves can be adjusted to suit the first threshing processing section, and the feed angle of the rear debris transport valves can be adjusted to suit the second threshing processing section.
In the present invention, it is preferable that each of the first angle adjusting mechanism and the second angle adjusting mechanism includes a driving motor and a link mechanism that joins the driving motor and the debris feeding valves, an inclined surface portion in a downward inclined orientation in which an outer side is located downward is formed at one end of the top plate in a left-right direction, and the first angle adjusting mechanism and the second angle adjusting mechanism are disposed in an upper space having a triangular cross-sectional shape, which is formed directly above the inclined surface portion.
According to this configuration, the first angle adjusting mechanism and the second angle adjusting mechanism are arranged effectively utilizing the upper space with a triangular cross-sectional shape that is formed at one end of the top plate in the left-right direction, whereby the first angle adjusting mechanism and the second angle adjusting mechanism can be compactly disposed with as little outward protrusion as possible.
In the present invention, it is preferable that the top plate is divided into a first top plate provided with the plurality of front debris transport valves and a second top plate provided with the plurality of rear debris transport valves, and a front debris transport valve located at a rear end among the plurality of front debris transport valves is configured to be switched to enter a region below the second top plate.
According to this configuration, since the top plate is divided, when the top plate is removed for maintenance work, the divided first top plate and second top plate are removed separately, thereby reducing the size and weight, and therefore handling is easier. As a result of such division, division surfaces are formed at an intermediate location in the front-rear direction of the threshing chamber, and therefore there is a risk that the threshing material may get caught. However, in this configuration, the threshing material can be smoothly and easily fed rearward by switching the front debris transport valve to enter the region below the second top plate.
In the present invention, it is preferable to further include: a raking section including a spiral blade at a front part of the threshing drum; and a fixed debris transport valve with a fixed feed angle above the raking section.
According to this configuration, the crops introduced into the front part of the threshing chamber can be smoothly transported while being threshed by the threshing drum due to the raking action of the raking section. At this time, since the crop is raked in by the spiral blade, if the feed inclination of the spiral blade and the feed angle by the debris transport valve differ greatly, there is a risk that the crop cannot be transferred smoothly. However, by providing a debris transport valve fixed at a feed angle suitable for the feed action above the raking section, the transfer can be performed smoothly.
In the present invention, it is preferable that a receiving net is provided extending along an outer periphery of the threshing drum, below the threshing drum, and an interval in a radial direction between a movement path of a radial outer end of the threshing drum and a radial inner end of the debris transport valve is greater than an interval in a radial direction between the movement path of the radial outer end of the threshing drum and a radial inner end of the receiving net.
According to this configuration, by narrowing the interval between the threshing drum and the receiving net to such an extent that the drive load does not become excessive, the crops can be favorably threshed. On the other hand, there is no need to narrow the interval between the threshing drum and the debris transport valve because threshing is not performed. In view of this, by increasing the interval between the threshing drum and the receiving net, it is possible to favorably transfer the crop rearward without clogging or the like.
The solution corresponding to the problem of providing a harvester capable of easily and inexpensively adjusting the interval between the receiving net and the threshing drum in such a manner that the interval is changed in various ways in the circumferential direction of the threshing drum in [Problem 1] is as follows.
A harvester according to the present invention includes: a harvesting section configured to harvest a crop in a field; and a threshing apparatus into which the crop harvested by the harvesting section is introduced and which is configured to thresh the introduced crop, in which the threshing apparatus includes: a threshing chamber into which the crop is introduced; a threshing drum that is provided in the threshing chamber so as to rotate with a threshing drum axis extending in a front-rear direction of the threshing chamber serving as a rotation center, and configured to thresh the crop introduced into the threshing chamber; and a receiving net provided in an outer periphery of a lower part of the threshing drum, the receiving net is divided into a plurality of divided receiving net bodies in a peripheral direction of the threshing drum, each of the plurality of divided receiving net bodies includes a support shaft provided extending in the front-rear direction on one end in the peripheral direction of the divided receiving net body, and is supported in such a manner as to be capable of swinging vertically with the support shaft serving as a swinging support point, the harvester further includes a single actuator linked to the plurality of divided receiving net bodies via a link mechanism, and the link mechanism swings the plurality of divided receiving net bodies vertically due to being operated by the actuator, and adjusts an interval in a radial direction of the threshing drum between the divided receiving net body and the threshing drum in the plurality of divided receiving net bodies.
According to this configuration, the interval between the receiving net and the threshing drum (the interval in the radial direction of the threshing drum) in the plurality of divided receiving net bodies can be adjusted for each divided receiving net body, and therefore the interval can be adjusted in such a manner as to change in various ways in the peripheral direction of the threshing drum. Since a plurality of divided receiving net bodies are operated by one actuator, the number of operations for operating the actuators can be reduced, the required number of actuators can be reduced, and the interval adjustment can be performed easily and inexpensively, compared to the case of operating the plurality of divided receiving net bodies with separate actuators.
In the present invention, it is preferable that the support shaft of the divided receiving net body is provided on an end located downstream in a threshing material movement direction in the divided receiving net body, out of both ends in the peripheral direction of the divided receiving net body.
According to this configuration, since the threshing material moves toward the support shaft from the side opposite to the support shaft in the divided receiving net body, a large amount of threshing material is located between the divided receiving net body and the threshing drum on the side opposite to the shaft, relative to the amount between the divided receiving net body and the threshing drum on the support shaft side. When the interval between the receiving net and the threshing drum is adjusted, the interval between the divided receiving net body and the threshing drum on the side opposite to the support shaft becomes wider than the interval between the divided receiving net body and the threshing drum on the support shaft side, and therefore although the interval between the receiving net and the threshing drum is adjusted by vertically swinging the divided receiving net body, threshing is performed without clogging even if a large amount of threshing material is introduced into the threshing chamber.
In the present invention, it is preferable that the link mechanism is joined to an end opposite to where the support shaft is located in each of the plurality of divided receiving net bodies.
According to this configuration, since the operating force of the link mechanism can be easily transmitted to the divided receiving net body, the divided receiving net body can be smoothly swung by the link mechanism.
In the present invention, it is preferable that the link mechanism includes: a parallel link that is moved in parallel by the actuator; and a swinging link that has a free end engaged with the parallel link and performs output to the divided receiving net body by being swung by the parallel link, the parallel link and the free end are engaged by an elongated groove provided in one of the parallel link and the free end, and a linking member supported by the other of the parallel link and the free end while being slidably inserted in the elongated groove, and the linking member is rotatably supported by the other of the parallel link and the free end while being formed in a non-circular shape so as to be non-rotatably inserted in the elongated groove.
According to this configuration, when the parallel link is moved in parallel by the actuator, the swinging link is swung due to the motive power of the parallel link being transmitted to the swinging link while the linking member slides in the elongated groove, and motive power is output to the divided receiving net body. If the linking member is in a circular shape and transmits motive power between the parallel link and the swinging link while the linking member rotates in the elongated groove, the linking member comes into point contact with the inner wall of the elongated groove, and as a result, the linking member and the inner wall of the groove are easily worn. According to this configuration, the linking member is in a non-circular shape and cannot rotate with respect to the elongated groove, but is rotatably supported by the parallel link or the free end (swinging link) to transmit motive power between the parallel link and the swinging link, that is, the linking member transmits motive power while being in line contact with the inner wall of the elongated groove, and therefore the linking member and the inner wall of the groove can be made less likely to wear.
The solution corresponding to [Problem 3] is as follows.
The characteristic configuration of the threshing apparatus according to the present invention includes: a threshing chamber into which a reaped grain culm is introduced; a threshing drum rotatably provided in the threshing chamber; a receiving net provided along an outer periphery of the threshing drum, below the threshing drum; and a sorting apparatus that is located below the receiving net and receives and sorts threshing material leaked from the receiving net while swinging and transferring the threshing material, in which an upstream end of the receiving net located on an upstream side in a rotation direction of the threshing drum is located at a position lower than a rotation axis of the threshing drum, and a side wall portion is included at the upstream side in the rotation direction of the threshing chamber relative to the upstream end of the receiving net, and a downstream end of the receiving net located on a downstream side in the rotation direction of the threshing drum is located at a position higher than the rotation axis of the threshing drum.
According to the present invention, the upstream end of the receiving net is located at a position lower than the rotation axis of the threshing drum, and the downstream side in the rotation direction relative to the upstream end of the receiving net is covered by the side wall. In the portion of the sorting apparatus located on the upstream side in the rotation direction of the threshing drum in the receiving net, the leakage area of the receiving net per unit width in the left-right direction is smaller than in the conventional configuration, and the amount of threshing material that falls on the sorting apparatus can be reduced. That is, it is possible to reduce the variation in the amount of processing material in the sorting apparatus and improve the sorting accuracy.
Since the downstream end of the receiving net is located higher than the rotation axis of the threshing drum, the region from the upstream end to the downstream end of the receiving net is a wide range similar to the conventional one. As a result, the crops can be favorably threshed in cooperation with the threshing drum, and there is no risk of lowering the threshing capacity.
Accordingly, it is possible to improve the sorting accuracy when sorting the threshing material without lowering the threshing capacity.
In the present invention, it is preferable that in a view in a rotation axis direction of the threshing drum, the sorting section is arranged biased to one side in a left-right direction with respect to the threshing drum.
According to this configuration, due to the sorting apparatus being biased in the left-right direction with respect to the threshing drum, for example, when the location with the most threshing material is moved to the center instead of the end in the left-right direction of the sorting apparatus, the processing material is distributed to the left and right and variation can be reduced.
In the present invention, it is preferable that the sorting apparatus is arranged biased such that a center position in the left-right direction of the sorting apparatus is a position biased toward the downstream end of the receiving net with respect to the rotation axis of the threshing drum.
According to this configuration, as described above, it is possible to reduce the amount of threshing material at the location corresponding to the upstream side of the receiving net in the sorting apparatus, and furthermore, since the leakage area of the receiving net is wider at the portion corresponding to the downstream end of the receiving net, the threshing material leaks over a wide range. In view of this, by biasing the sorting apparatus toward the downstream end of the receiving net, it is possible to reduce the variation in the threshing material overall.
In the present invention, it is preferable that the upstream end of the receiving net is located inward in the left-right direction with respect to a movement path outer end position that is located on an outermost side in the left-right direction of a movement path of a radial outer end of the threshing drum and is close to the upstream end.
According to this configuration, the upstream end of the receiving net is located at a position sufficiently lower than the rotation axis of the threshing drum to the extent that it falls within the range of the movement path of the radial outer end of the threshing drum in a plan view, and therefore, it is possible to further reduce the variation in the amount of processing material to be processed.
An embodiment (first embodiment), which is an example of the present invention, will be described below with reference to the drawings.
An embodiment, which is an example of the present invention, will be described below with reference to the drawings.
Note that in the following description, regarding a traveling machine body of a combine (an example of a “harvester”), the direction of arrow F shown in
Overall Configuration of Combine in First Embodiment
As shown in
Configuration of Threshing Apparatus in First Embodiment
In describing the threshing apparatus 6, the processing start end of the threshing apparatus 6 [the culm input side (the left side of the paper surface of
As shown in
As shown in
As shown in
In the threshing section 6A, the intermediate conveying apparatus 9 introduces all the harvested grain culms from the root base to the ear tip into the front part of the threshing chamber 11, and the introduced threshing material is raked into the threshing processing section 18 by a spiral blade 17a of the raking section 17 and threshed by the threshing teeth 28 and the receiving net 13. The threshing material to be threshed is threshed while being transferred toward the rear of the threshing chamber 11 by the rotating threshing teeth 28. The grain obtained through the threshing leaks from the receiving net 13 and is received by the sorting section 6B. Threshing material such as threshed grain culms and cut straw generated through the threshing are discharged to the outside of the threshing chamber 11 from a debris discharge portion 19 located at the rear lower portion of the threshing chamber 11.
Structure of Threshing Drum in First Embodiment
As shown in
As shown in
Specifically, as shown in
Adjustment of Interval between Receiving Net and Threshing Drum in First Embodiment
When crops with different properties are harvested, the amount of crops supplied to the threshing apparatus 6 is different, or the like, it is preferable to adjust the interval S in the threshing drum radial direction between the receiving net 13 and the threshing drum 12. The receiving net 13 is divided into a plurality of divided receiving net bodies 13A in the front-rear direction of the threshing chamber 11, and the interval S between the receiving net 13 and the threshing drum 12 can be adjusted such that the interval S is changed in each divided receiving net body 13A.
Specifically, in this embodiment, the receiving net 13 is divided into two divided receiving net bodies 13A in the front-rear direction of the threshing chamber 11, as shown in
In
As shown in
As shown in
The interval adjustment mechanism 30 of the rear divided receiving net body 13A is configured in the same manner as the interval adjusting mechanism 30 of the front divided receiving net body 13A. As shown in
The interval adjusting mechanism 30 of the front divided receiving net body 13A is operated by the first electric motor M1 to operate the support link mechanisms 21 at a plurality of locations and adjust the interval between the front divided receiving net body 13A and the threshing drum 12, and the interval adjusting mechanism 30 of the rear divided receiving net body 13A is operated by the second electric motor M2 to operate the support link mechanisms 21 at a plurality of locations and adjust the interval between the rear divided receiving net body 13A and the threshing drum 12.
The interval between the divided receiving net body 13A and the threshing drum 12 can be adjusted for each divided receiving net body. For example, in the interval adjusting mechanism 30 of the front divided receiving net body 13A and the interval adjusting mechanism 30 of the rear divided receiving net body 13A, the first electric motor M1 and the second electric motor M2 are driven in different rotation directions. As a result, the interval S between one of the front and rear divided receiving net bodies 13A and the threshing drum 12 is narrowed, and the interval S between the other of the front and rear divided receiving net bodies 13A and the threshing drum 12 widens. By driving the first electric motor M1 and the second electric motor M2 so as to rotate by different amounts of rotation, the adjustment allowance of the interval S between the front divided receiving net body 13A and the threshing drum 12 and the adjustment allowance for the interval S between the rear divided receiving net body 13A and the threshing drum 12 are different from each other.
(1)
As shown in
The operating link 42 is swingably supported by a support portion 44 provided in the threshing apparatus 6 via a support pin 45. A screw shaft 46 that can be rotated forward and in reverse by the third electric motor M3 is inserted in a screw hole of a joining portion 42a rotatably provided in the operation link 42, whereby the operation link 42 and the third electric motor M3 are linked together.
One end of the front joining link 43 is engaged with the free end of the operating link 42 via a joining pin 47, and the other end of the front joining link 43 is joined to the link support shaft 23 of the first swinging link 24 of the front divided receiving net body 13A, whereby the operating link 42 and the first swinging link 24 are linked to each other. The joining pin 47 is slidably and rotatably inserted in a first elongated hole 48 provided in the operating link 42.
As shown in
One end of the rear joining link 49 is engaged with the free end of the operating link 42 via a joining pin 50, and the other end of the rear joining link 49 is engaged with the link support shaft 23 of the first swinging link 24b of the rear divided receiving net body 13A, whereby the operating link 42 and the first swinging link 24 are linked to each other. The joining pin 50 is slidably and rotatably inserted in a second elongated hole 51 provided in the operating link 42.
As shown in
In the interval adjusting mechanism 40 having another embodiment, the motive power of the third electric motor M3 is transmitted to the front divided receiving net body 13A as operating power due to the front link mechanism portion 41A of the link mechanism 41 transmitting the motive power of the third electric motor M3 to the support link mechanism 21 of the front divided receiving net body 13A, the motive power of the third electric motor M3 is transmitted to the rear divided receiving net body 13A as operating power due to the rear link mechanism portion 41B of the link mechanism 41 transmitting the motive power of the third electric motor M3 to the support link mechanism 21 of the rear divided receiving net body 13A, and thus the interval between the front divided receiving net body 13a and the threshing drum 12 is adjusted, and the interval between the rear divided receiving net body 13A and the threshing drum 12 is adjusted. The same third electric motor M3 adjusts the interval between the front divided receiving net body 13a and the threshing drum 12 and the interval between the rear divided receiving net body 13A and the threshing drum 12.
In the interval adjusting mechanism 40 having another embodiment, the interval between the front and rear divided receiving net bodies 13A and the threshing drum 12 is adjusted using the motive power of the same third electric motor M3, but the interval between the front and rear divided receiving net bodies 13A and the threshing drum 12 is adjusted in a state in which the link ratio by which the front link mechanism portion 41A transmits the motive power of the third electric motor M3 to the front divided receiving net body 13A and the link ratio by which the rear link mechanism portion 41B transmits the motive power of the third electric motor M3 to the rear divided receiving net body 13A are different from each other, and the adjustment allowance between the threshing drum 12 and the front divided receiving net body 13A and the adjustment allowance for the threshing drum 12 and the rear divided receiving net body 13A are different from each other.
(2) In the above-described embodiment, an example in which the receiving net 13 is divided into two divided receiving net bodies 13A was shown, but the receiving net 13 may be divided into three or more divided receiving net bodies.
(3) In the above-described embodiment, an example was shown in which the bending point K is provided in the divided receiving net body 13A, but the bending point K need not be provided.
(4) In the above-described embodiment, an example was shown in which the threshing drum 12 provided with threshing teeth of different shapes in the threshing processing section 18 is adopted, but a threshing drum in which all of the threshing teeth have the same shape in the threshing processing section 18 may be adopted.
(5) In the above-described embodiment, the receiving net 13 constituted by a lattice receiving net is adopted, but other than a lattice net, it is possible to adopt a crimp net, a resin net, or the like.
(6) In the above-described embodiment, an example was shown in which the first electric motor M1 is provided outside the front wall 14, and the second electric motor M2 is provided outside the rear wall 15, but the first electric motor M1 and the second electric motor M2 may be provided at any position. Also, the third electric motor M3 may be provided at any position. In the above-described embodiment, an example was shown in which the first electric motor M1, the second electric motor M2, and the third electric motor M3 are adopted, but a hydraulic actuator such as a hydraulic cylinder may be adopted in place of an electric motor.
(7) In the above-described embodiment, the combine having the pre-threshing section 8 and the intermediate conveying apparatus 9 was illustrated, but there is no limitation to this. A configuration of the combine may be adopted in which the reaped grain culms are directly supplied from the feeder 5b to the threshing apparatus 6 without the pre-threshing section 8 and the intermediate conveying apparatus 9.
An embodiment (second embodiment) that is an example of the present invention will be described below with reference to the drawings. Note that the overall configuration of the combine, the configuration of the threshing apparatus, and the configuration of the threshing drum are the same as in the first embodiment. Only the differences from the first embodiment will be described below, and description of configurations that are the same will be omitted.
Adjustment of Interval between Receiving Net and Threshing Drum in Second Embodiment
When crops with different properties are harvested, the amount of crops supplied to the threshing apparatus 6 is different, or the like, it is preferable to adjust the interval S in the threshing drum radial direction between the receiving net 13 and the threshing drum 12. The receiving net 13 is divided into a plurality of divided receiving net bodies 13Ain the peripheral direction of the threshing drum 12, and the interval S between the receiving net 13 and the threshing drum 12 can be adjusted in such a manner that the interval between the receiving net 13 and the threshing drum 12 is changed for each divided receiving net body 13A.
Specifically, in this embodiment, the receiving net 13 is divided into two divided receiving net bodies 13A in the peripheral direction of the threshing drum 12, as shown in
In
The support shafts 121 and 123 of the two divided receiving net bodies 13A are provided in notches 13k provided in the frame portions 13w of the divided receiving net bodies 13A and are supported by a plate-shaped threshing frame 120. The threshing frame 120 is supported by the threshing apparatus 6 at a plurality of locations along the front-rear direction of the threshing chamber 11. The support links 122 and 124 of the two divided receiving net bodies 13A are provided in the frame portions 13w of the divided receiving net bodies 13A. The support link 122 of the left divided receiving net body 13A is supported by a support shaft 125 supported by the threshing frame 120 while extending in the threshing chamber front-rear direction. The support link 124 of the right divided receiving net body 13A is supported by the support shaft 121. The support shaft 121 provided in the left divided receiving net body 13A and the support shaft 121 supporting the support link 124 of the right divided receiving net body 13A are a common support shaft. The support link 122 of the left divided receiving net body 13A is supported by the support shaft 125 while being vertically swung around the support shaft 125 serving as a swinging support point due to the rotation of the support shaft 125. The support link 124 of the right divided receiving net body 13A is supported by the support shaft 121 while being vertically swung with the support shaft 121 serving as a swinging support point due to the rotation of the support shaft 121. The support link 122 of the left divided receiving net body 13A and the divided receiving net body 13A are linked by joining the free end of the support link 122 and the frame portion 13w with a joining pin 126 so as to be able to swing relative to each other. The support link 124 of the right divided receiving net body 13A and the divided receiving net body 13A are linked such that the frame portion 13w is received from below by the joining pin 126 provided at the free end of the support link 124. When the support link 124 is swung downward, the right divided receiving net body 13A is swung downward by the weight of the divided receiving net body 13A with the support shaft 123 serving as the swinging support point, and when the support link 124 is swung upward, the right divided receiving net body 13A is swung upward by the pressing performed by the support link 124 with the support shaft 123 serving as the swinging support point.
The support links 122 and 124 at a plurality of locations are swung, whereby the two divided receiving net bodies 13A are swung vertically with the support shafts 121 and 123 provided at the end on the downstream side in the processing material movement direction serving as the swinging support point, and thus the interval S between the divided receiving net body 13A and the threshing drum 12 changes. The interval S between the divided receiving net body 13A and the threshing drum 12 is the interval between the horizontal bars 13y of the divided receiving net body 13A and the rotation path T of the tip of the threshing teeth of the threshing cylinder 12. The change in the interval S between the divided receiving net body 13A and the threshing drum 12 occurs when the interval opposite to the support point of the divided receiving net body 13A (the interval on the upstream side in the threshing material movement direction of the divided receiving net body 13A) changes more than the interval on the support point side of the divided receiving net body 13A (the interval on the downstream side in the threshing material movement direction of the divided receiving net body 13A).
In this embodiment, as shown in
Interval Adjusting Mechanism in Second Embodiment
As shown in
As shown in
The link mechanism 131 is joined to the end of each of the two divided receiving net bodies 13A on the side opposite to the support shaft. Specifically, as shown in
The link between the electric motor M and the parallel link 132 is achieved by providing the electric motor M with a screw shaft 133 serving as an output shaft capable of forward and reverse rotation, providing the operation section 132a for moving the parallel link 132 at the intermediate portion of the parallel link 132, and inserting the screw shaft 133 in a screw hole provided in the operation section 132a.
As shown in
As shown in
The engagement between the parallel link 132 and the free end 135a of the swinging link 135 is achieved by the parallel link 132 being provided with an elongated groove 140 as shown in
The engagement between the parallel link 132 and the left operating link 134 is achieved by an engagement structure having the same configuration as the engagement structure in which the parallel link 132 and the free end 135a of the swinging link 135 are engaged with each other. The engagement of the parallel link 132 and the left operating link 134 is achieved by the elongated groove provided in the parallel link 132, and a non-circular linking member that is slidably and non-rotatably inserted in the elongated groove, and is rotatably supported by the left operating link 134 via the joining pin 134a. The engagement between the free end of the right operating link 136 and the free end of the joining link 137 is achieved by an engagement structure having the same configuration as the engagement structure in which the parallel link 132 and the free end 135a of the swinging link 135 are engaged with each other. The engagement between the free end of the right operating link 136 and the free end of the joining link 137 is achieved by an elongated groove provided in the right operating link 136, and a non-circular linking member that is slidably and non-rotatably inserted in the elongated groove, and is rotatably supported by the joining link 137 via the joining pin 139.
In this embodiment, the electric motor M, the left operating link 134, the parallel link 132, the swinging link 135, the right operating link 136, and the joining link 137 are arranged on the side surface opposite to the receiving net side of the threshing frame 120 located frontmost among the plurality of threshing frames 120, as shown in
(1) An example was described in which the left divided receiving net body 13A and the right divided receiving net body 13A are provided as one divided receiving net body corresponding to the first threshing processing section 18F and the second threshing processing section 18R, but there is no limitation to this. For example, it is preferable that the left divided receiving net body 13A and the right divided receiving net body 13A are divided into the front divided receiving net body section corresponding to the first threshing processing section 18F and the rear divided receiving net body section corresponding to the second threshing processing section 18R in the front-rear direction of the threshing chamber 11.
(2) In the above-described embodiment, an example was described in which the receiving net 13 is divided into two divided receiving net bodies 13A in the peripheral direction of the threshing drum 12, but the receiving net 13 may also be divided into three or more divided receiving net bodies.
(3) In the above-described embodiment, the receiving net 13 constituted by a lattice receiving net is employed, but other than a lattice net, it is possible to employ a crimp net, a resin net, or the like.
(4) In the above-described embodiment, an example was described in which the support shafts 121 and 123, which serve as the swinging support points of the divided receiving net body 13A, are provided on the downstream side in the threshing material movement direction of the divided receiving net body 13A, but the support shafts 121 and 123 may also be provided on the upstream side in the threshing material movement direction of the divided receiving net body 13A.
(5) In the above-described embodiment, an example was shown in which the link mechanism 131 is joined to the end opposite to the support shaft side of the divided receiving net body 13A, but the link mechanism 131 may also be joined to the end on the support shaft side of the divided receiving net body 13A.
(6) In the above-described embodiment, an example was shown in which the threshing drum 12 provided with threshing teeth of different shapes in the threshing processing section 18 is adopted, but a threshing drum in which the shapes of all of the threshing teeth in the threshing processing section 18 are the same may also be employed.
(7) In the above-described embodiment, an example was shown in which the electric motor M is employed, but there is no limitation to this. For example, various actuators such as hydraulic actuators, such as hydraulic cylinders, may be used.
(8) In the above-described embodiment, the combine having the pre-threshing section 8 and the intermediate conveying apparatus 9 was illustrated, but there is no limitation to this. It is also possible to employ a combine in which the reaped grain culms are directly supplied from the feeder 5b to the threshing apparatus 6 without the pre-threshing section 8 and the intermediate conveying apparatus 9.
An embodiment (third embodiment) that is an example of the present invention will be described below with reference to the drawings. Here, a case is described where an embodiment of a threshing apparatus according to the present invention is applied to a threshing apparatus for a common combine. In this embodiment, the direction indicated by reference sign (F) is the body front side, and the direction indicated by reference sign (B) is the body rear side (see
Overall Configuration of Combine in Third Embodiment
As shown in
The reaping/conveying section 201 includes a reaping section 210 serving as a harvesting section that reaps planted crops and gathers the reaped crops in the center in the cutting width direction, and a feeder 211 serving as a crop conveying apparatus that conveys the crops that were reaped and gathered in the center, toward the threshing apparatus 204 in the body rear side. Although not described in detail, the reaping section 210 includes a rotary reel 212 that rakes the ear tip side of the crops to be reaped rearward, a reaping blade 213 that performs reaping by cutting the root base of the crops, a lateral feeding auger 214 that gathers the reaped crops to the center in the reaping width direction, and the like.
A threshing apparatus 204 that receives and threshes the reaped grain culms transported by the feeder 211 as threshing material and sorts the threshing material is provided rearward of the reaping/conveying section 201. A grain tank 205 for collecting and storing single grains conveyed from the threshing apparatus 204 is provided above the front part of the threshing apparatus 204. The motor section 207 is provided above the rear part of the threshing apparatus 204.
Threshing Apparatus in Third Embodiment
Next, the threshing apparatus 204 will be described.
As shown in
First Threshing Section in Third Embodiment
The first threshing section 215 will be described.
The first threshing section 215 includes a first threshing drum 217 that rotates about a left-right-oriented axis X. The first threshing drum 217 includes a rotary support shaft 218 that extends along the left-right direction and is rotatable, a plurality of rod-shaped threshing teeth 219 that extend in the left-right direction and are spaced apart in the peripheral direction, a plurality of support members 220 that support the plurality of rod-shaped threshing teeth 219 on the rotary support shaft 218 in a state where the radial distance from the rotary support shaft 218 is the same and in a state where they can rotate together. The threshing teeth 219 are formed in a rod shape extending in the left-right direction over the entire width in the left-right direction of the first threshing drum 217, and constituted by rasp threshing teeth (see
The support members 220 are constituted by plate bodies that are substantially star-shaped in a view from the side, and a plurality thereof are provided at an interval in the left-right direction. The center of the support member 220 is fixed to the rotary support shaft 218 and is supported so as to be integrally rotatable. The threshing teeth 219 are fixed to the plurality of support members 220 by fastening bolts.
A first receiving net 221 is provided in a region below the first threshing drum 217 in the outer peripheral portion of the first threshing drum 217. When the first threshing drum 217 is rotated counterclockwise in
An intermediate conveying apparatus 222 that conveys the threshing material threshed in the first threshing section 215 to the second threshing section 216 is provided between the first threshing section 215 and the second threshing section 216. The intermediate conveying apparatus 222 conveys the threshing material toward the second threshing section 216 without leaking downward.
The width in the left-right direction of the intermediate conveying apparatus 222 is the same as the width in the left-right direction of the first threshing section 215. The intermediate conveying apparatus 222 has a configuration similar to that of the lateral feed auger 214, which has a left-right-oriented axis and extends over the entire width in the left-right direction. The intermediate conveying apparatus 222 includes a cylindrical drum 223, spiral blades 224 provided on both left and right sides of the outer periphery of the drum 223, a plurality of raking members 225 provided in the center in the left-right direction of the outer periphery of the drum 223, and a semi-cylindrical bottom plate 226.
The left and right spiral blades 224 are fixed to the outer periphery of the drum 223 and provided in a state in which the feeding directions are opposite to each other. The raking member 225 is fixed to the outer periphery of the drum 223 and is constituted by a plate-shaped member extending radially outward. A plurality of raking members 225 are provided at appropriate intervals in the peripheral direction of the drum 223.
When a driving mechanism (not shown) rotates the drum 223 counterclockwise as shown in
The second threshing section 216 includes a threshing chamber 227 for threshing the introduced threshing material. Although the threshing chamber 227 will be described later, the width in the left-right direction of the threshing chamber 227 is narrower than the width in the left-right direction of the intermediate conveying apparatus 222. The left and right spiral blades 224 are provided in regions of the intermediate conveying apparatus 222 that protrude outward on both sides in the left and right direction from both left and right end portions of the threshing chamber 227. Accordingly, the intermediate conveying apparatus 222 gathers the threshing material in the center in the left-right direction, and then can smoothly introduce it into the rearward threshing chamber 227.
As shown in
Second Threshing Section in Third Embodiment
The second threshing section 216 will be described.
As shown in
The rearward rising inclination angle θ1 of a virtual line LN connecting the lower end position of the first threshing section 215 and the lower end position of the intermediate conveying apparatus 222 is set larger than the rearward rising inclination angle θ2 of the second threshing section 216. That is, compared to the degree of rearward rising from the first threshing section 215 to the intermediate conveying apparatus 222, the degree of rearward rising of the second threshing section 216 is smaller.
As shown in
The rotary support shaft 229 of the second threshing drum 228 is made of one piece extending from the front end to the rear end of the second threshing drum 228, and is elongated in the front-rear direction. A self-aligning bearing is used as a bearing member that rotatably supports both front and rear sides of the rotary support shaft 229. Although not shown, the second threshing drum 228 is rotationally driven by transmission of motive power to the rear side. When the processing material is clogged or the like and the threshing drum is locked, a force acts on the rear portion of the rotary support shaft 229 in a twisting direction. In view of this, as shown in
The second threshing drum 228 is rotationally driven in the clockwise direction (clockwise) in a front view with the rotation support shaft 229 serving as the center of rotation. The lower front portion of the threshing chamber 227 includes an opening that allows the threshing material to be introduced into the threshing chamber 227. A region below the second threshing drum 228 in the surrounding area of the second threshing drum 228 is equipped with a second receiving net 233.
As shown in
The front part of the second threshing drum 228 is provided with a raking section 239 having a spiral blade 238. The raking section 239 has a spiral blade 238 integrally fixed to the outer periphery of a tapered drum 240. A front end of the drum 240 is joined to the rotary support shaft 229. A rear end of the drum 240 is joined to a rotary support shaft 229 via a front support member 241. As the rotary support shaft 229 rotates, the raking section 239 rakes the introduced threshing material rearward using the feed action of the spiral blades 238.
As shown in
A portion rearward of the raking section 239 of the second threshing drum 228 is provided with a threshing processing section 243.
The threshing processing section 243 includes a first threshing processing section 244 on the front side and a second threshing processing section 245 on the rear side, and the shapes of the threshing teeth of the first threshing processing section 244 and the second threshing processing section 245 are different from each other.
The configuration of the threshing processing section 243 will be described.
As shown in
The threshing processing section 243 includes a first threshing processing section 244 having six front frame bodies 230a located frontward of the second intermediate support member 247b in the frame body 230, and a second threshing processing section 245 having six rear frame bodies 230b located rearward of the second intermediate support member 247b in the frame body 230.
The front frame bodies 230a and the rear frame bodies 230b are obtained by dividing a single frame body having a front-rear length that spans the front support member 241 and the rear support member 246 in two pieces in the front-rear direction at a position corresponding to the second intermediate support member 247b. The front frame bodies 230a and the rear frame bodies 230b are set to have the same length.
As shown in
As shown in
As described above, the front frame bodies 230a and the rear frame bodies 230b have the same length and the same attachment structure. Accordingly, the front frame bodies 230a can be attached also to the second threshing processing section 245, and the rear frame bodies 230b can be attached also to the first threshing processing section 244. That is, it is possible to replace them by disconnecting the bolts Bo and changing the front-rear position.
An interval Q1 in the radial direction between the front frame body 230a and the rotary support shaft 229 and an interval Q2 in the radial direction between the rear frame body 230b and the rotary support shaft 229 are different from each other. To add description, as shown in
Both the front frame bodies 230a and the rear frame bodies 230b are arranged in a distributed manner at equal intervals in the peripheral direction, and the front frame bodies 230a and the rear frame bodies 230b are arranged in different phases in the peripheral direction. Specifically, the front frame bodies 230a and the rear frame bodies 230b are arranged with their phases shifted in the peripheral direction such that the rear frame bodies 230b are each located at a substantially intermediate position in the peripheral direction between the two adjacent front frame bodies 230a.
By arranging in this way, the joining member 248 on the front frame body 230a side and the joining member 249 on the rear frame body 230b side can be displaced in the peripheral direction, and the task of joining to the second intermediate support member 247b can be performed easily.
The first threshing processing section 244 is provided with first threshing teeth 250 that have recesses and protrusions on the surface and thresh crops with use of the shape of the recesses and protrusions on the surface. The first threshing teeth 250 also have the same configuration as the threshing teeth 219 provided on the first threshing drum 217. That is, as shown in
As shown in
The first threshing teeth 250 are shaped like rods extending along the longitudinal direction of the front frame body 230a. The first threshing teeth 250 are supported by a support base 252 attached to the front frame body 230a. A plurality of support bases 252 (five in the example shown in
As shown in
The first threshing teeth 250 are detachably supported on the support base 252. As shown in
The second threshing processing section 245 includes second threshing teeth 257 extending radially outward in a rod shape. As shown in
The second threshing teeth 257 are fixed to the bracket 258 by tightening a bolt 259 while abutting on the intermediate portion 258b of the bracket 258 from the outside. The intermediate portion 257a of the second threshing teeth 257 is formed in a planar shape, and the outer surface of the intermediate portion 257a forms a threshing surface 257b that acts on crops. The fixing portion of the second threshing teeth 257 to the bracket 258, specifically, the formation locations of the insertion holes 260 through which the bolts 259 are inserted, are formed at two locations equidistant from the center in the longitudinal direction.
By being configured in this way, when the radial outer end of the second threshing teeth 257 is worn due to long-term threshing, the direction of the second threshing teeth 257 can be reversed in the longitudinal direction and can be fixed by a bolt in the other insertion hole 260.
As shown in
Accordingly, the threshing surface 257b of the second threshing teeth 257 is formed in an inclined orientation of being located on the downstream side in the rotation direction toward the rear, and is inclined so as to be located on the downstream side in the rotation direction of the second threshing drum 228 toward the outside in the radial direction in a view in the axial direction of the rotary support shaft 229.
As shown in
The second threshing drum 228 is formed in a basket shape with an internal space Z that is in communication with the outer peripheral space through the space between the front frame bodies 230a and the space between the rear frame bodies 230b. Accordingly, the second threshing drum 228 allows the processing material to enter the internal space Z during threshing, whereby it is possible to avoid an excessive drive load due to the second threshing drum 228.
As shown in
The sorting section 261 includes a grain pan 265 extending from the region below the first threshing section 215 to the region below the second threshing section 216. The rear end of the grain pan 265 extends to a position below the front end of second receiving net 233.
The grain pan 265 can transfer the threshing material that has leaked down from the first receiving net 221 of the first threshing section 215 to the region below the second threshing section 216 as-is. As a result, the sorting can be efficiently performed together with the threshing material leaked from the second receiving net 233 of the second threshing section 216.
Debris Transport Valves in Third Embodiment
Next, the debris transport valves 237 will be described.
As shown in
Of the plurality of debris transport valves 237 attached to the top plate 236, the plurality of debris transport valves 237 other than the front end debris transport valve 237a are attached in such a manner that the feed angle can be changed. Among the plurality of debris transport valves 237, the respective feed angles of a plurality of front debris transport valves 237b (four in the example shown in
The plurality of front debris transport valves 237b are provided on the top plate 236 at positions corresponding to the first threshing processing section 244, and the plurality of rear debris transport valves 237c are provided on the top plate 236 at positions corresponding to the second threshing processing section 245. That is, the plurality of front debris transport valves 237b are provided on the first top plate 236A, and the plurality of rear debris transport valves 237c are provided on the second top plate 236B. Among the plurality of front debris transport valves 237b, the front debris transport valve 237b located at the rear end can be switched to enter the region below the second top plate 236B.
As shown in
Also, an interlocking link 269 is joined via a joining pin 270 to the right free end of each of the plurality of rear debris transport valves 237c. That is, the plurality of rear debris transport valves 237c are linked by the interlocking link 269 so as to swing in a linked manner in the same swinging direction.
A first angle adjusting mechanism 271 capable of simultaneously changing the feed angles of the plurality of front debris transport valves 237b, and a second angle adjusting mechanism 272 capable of simultaneously changing the feed angles of the plurality of rear debris transport valves 237c are provided.
As shown in
Since the first angle adjusting mechanism 271 and the second angle adjusting mechanism 272 have the same configuration, the configuration of the first angle adjusting mechanism 271 will be described below, and the description of the second angle adjusting mechanism 272 will be omitted.
The first angle adjusting mechanism 271 includes an electric motor 274 serving as a driving motor and a link mechanism 275 that joins the electric motor 274 and the front debris transport valve 237b to each other. The electric motor 274 is supported by a support base 276 fixed to the top plate 236.
The link mechanism 275 includes an adjustment lever 277 extending laterally outward from a swinging support point shaft 266 of one of the plurality of front debris transport valves 237b, and an operation mechanism 278 for swinging the lever 277 back and forth with use of the driving of the electric motor 274. The operating mechanism 278 includes a screw shaft 279 that is rotationally driven by the electric motor 274, and a female screw member 280 that moves in the front-rear direction as the screw shaft 279 rotates, and an operation pin 281 provided facing upward on the female screw member 280 is engaged through an elongated insertion hole 282 formed in the adjustment lever 277.
The screw shaft 279 extends in the body front-rear direction and is rotatably supported by front and rear support brackets 283 fixed to the support base 276. The electric motor 274 is supported by a support bracket 283 on the front side.
When the screw shaft 279 is rotated by the driving of the electric motor 274, the female screw member 280 moves back and forth along with it, and the adjustment lever 277 swings back and forth. Then, the plurality of front debris transport valves 237b are swung by the interlocking link 267. That is, it is possible to adjust the feed angles of the plurality of front debris transport valves 237b.
As shown in
(1) In the above-described embodiment, the second threshing drum 228 includes the first threshing processing section 244 and the second threshing processing section 245, the plurality of front debris transport valves 237b are provided at positions corresponding to the first threshing processing section 244, and the plurality of rear debris transport valves 237c are provided at positions corresponding to the second threshing processing section 245. However, instead of this configuration, a configuration in which a plurality of front debris transport valves 237b are provided in the front region and a plurality of rear debris transport valves 237c are provided in the rear region may also be used as the configuration in which the second threshing drum 228 includes threshing processing sections with the same configuration over the entire region.
(2) In the above-described embodiment, the first angle adjusting mechanism 271 and the second angle adjusting mechanism 272 are arranged in the upper space US having a triangular cross-sectional shape, which is formed directly above the inclined surface portion 273 of the top plate 236. However, instead of this configuration, it is also possible to use a configuration in which the first angle adjusting mechanism 271 and the second angle adjusting mechanism 272 are provided above the upper surface of the top plate 236, and the installation state can be changed in various ways.
(3) In the above-described embodiment, the top plate 236 is divided into the first top plate 236a and the second top plate 236b. However, instead of this configuration, there may be a single top plate 236 over the entire region.
(4) In the above-described embodiment, the fixed debris transport valve 237a is provided above the raking section 239. However, instead of this configuration, it is also possible to use a configuration including a debris transport valve with a feed angle that can be changed, above the raking section 239.
(5) In the above-described embodiment, the first angle adjusting mechanism 271 and the second angle adjusting mechanism 272 include the electric motor 274 as the driving motor, and the link mechanism 275 including the adjustment lever 277 and the screw-feeding operation mechanism 278 is used. However, instead of this configuration, it is also possible to use a configuration in which a hydraulic motor is included as the driving motor, or the rotation of the driving motor is transmitted to the swinging support point shaft 266 via a deceleration gear mechanism. Also, it is possible to use a configuration in which the feed angle is manually adjusted without using a drive motor, and various configurations can be used as the first angle adjusting mechanism 271 and the second angle adjusting mechanism 272.
(6) In the above embodiment, the interval Q3 in the radial distance between the movement path of the radial outer end of the threshing drum 228 and the radial inner end of the debris transport valve 237 is greater than the interval Q4 in the radial direction between the movement path of the radial outer end of the threshing drum 228 and the radial inner end of the receiving net. However, instead of this configuration, it is also possible to use a configuration in which the intervals Q3 and Q4 are the same, a configuration in which the interval Q3 is smaller than the interval Q4, and the like.
An embodiment (fourth embodiment), which is an example of the present invention, will be described below with reference to the drawings.
In this embodiment, the configuration of the second receiving net 233 is different from that of the third embodiment, but other configurations are the same as those of the third embodiment. Only the differences from the third embodiment will be described below, and descriptions of the same configurations will be omitted.
Second Receiving Net in Fourth Embodiment
The second receiving net 233 is a receiving net having a known configuration formed by joining a plurality of arc-shaped horizontal bars and a plurality of vertical bars in a lattice pattern. Also, as shown in
The upstream end 233a of the second receiving net 233 is located inward in the left-right direction with respect to a movement path outer end position N that is located on an outermost side in the left-right direction of a movement path of a radial outer end of the second threshing drum 228 and is close to the upstream end 233a. With this configuration, the upstream end 233a of the second receiving net 233 is provided at a position sufficiently lower than the rotation axis Y of the second threshing drum 228.
The side wall portion 290 is provided in a state of being continuous in a substantial arc shape along the second receiving net 233. A left wall portion 227A of the threshing chamber 227 is provided on the upstream side in the rotation direction of the second threshing drum 228 relative to the side wall portion 290. A right wall portion 227B of the threshing chamber 227 is provided on the downstream side in the rotation direction of the second threshing drum 228 relative to the downstream end 233b of the second receiving net 233. In this way, the second threshing drum 228 prevents the threshing material from leaking out as it is moved around.
As shown in
That is, the sorting section 261 is arranged biased such that the center position CL in the left-right direction of the sorting section 261 is a position biased toward the downstream end of the second receiving net 233, that is, to the right side, with respect to the rotation axis Y of the second threshing drum 228. In other words, the sorting section 261 has a narrow range L1 from the position Py corresponding to the rotation axis Y of the second threshing drum 228 to the left end, and a wide range L2 from a position Py corresponding to the rotation axis Y of the second threshing drum 228 to the right end.
With this configuration, the amount of the threshing material leaked from the second receiving net 233 is reduced at the left end of the sorting section 261 on the second receiving net 233. On the other hand, on the right side, the amount of processing material increases overall by an amount corresponding to the amount by which the second receiving net 233 is extended to the right side and the leakage area is widened, but the variation is reduced by widening the receiving width on the right side of the sorting section 261 and reducing the processing amount per unit width in the left-right direction.
(1) In the above-described embodiment, the upstream end 233a of the second receiving net 233 is located on the right side with respect to the movement path outer end position N. However, the upstream end 233a of the second receiving net 233 may be located on the left side with respect to the movement path outer end position N, and the upstream end 233a of the second receiving net 233 may be located at the same position as the movement path outer end position N.
(2) In the above-described embodiment, the sorting section 261 is arranged biased such that the center position CL of the sorting section 261 in the left-right direction is biased toward the downstream end (right side) of the second receiving net 233 with respect to the rotation axis Y of the second threshing drum 228, but instead of this configuration, the center position CL in the left-right direction of the sorting section 261 may be arranged biased with respect to the rotation axis Y of the second threshing drum 228, and the center position CL in the left-right direction of the sorting section 261 may be arranged at the same position as the rotation axis Y of the second threshing drum 228.
(3) In the above embodiment, the second threshing drum 228 includes the first threshing processing section 244 on the front side and the second threshing processing section 245 on the rear side, which have different threshing teeth. However, instead of this configuration, the second threshing drum 228 may have one threshing processing section having the same threshing teeth. Also, the configuration of the threshing teeth is not limited to rasp threshing teeth and rod- shaped threshing teeth, and various types of threshing teeth can be used.
The present invention is applicable not only to combines for harvesting rice, wheat, buckwheat, and the like, but also to various harvesters for harvesting corn.
Moreover, the present invention can be applied to a threshing apparatus for threshing harvested crops.
First Embodiment
Second Embodiment
Third Embodiment
Fourth Embodiment
| Number | Date | Country | Kind |
|---|---|---|---|
| 2020-125588 | Jul 2020 | JP | national |
| 2020-125589 | Jul 2020 | JP | national |
| 2020-125590 | Jul 2020 | JP | national |
| 2020-125591 | Jul 2020 | JP | national |
This application is the United States national phase of International Application No. PCT/JP2021/024910 filed Jul. 1, 2021, and claims priority to Japanese Patent Application No. 2020-125588 filed Jul. 22, 2020, 2020-125589 filed Jul. 22, 2020, 2020-125590 filed Jul. 22, 2020, and 2020-125591 filed Jul. 22, 2020, the disclosures of which are hereby incorporated by reference in their entireties.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2021/024910 | 7/1/2021 | WO |
